CVE-2026-4426 — Libarchive: libarchive: denial of service via malformed iso file processing
A flaw was found in libarchive. An Undefined Behavior vulnerability exists in the zisofs decompression logic, caused by improper validation of a field (`pz_log2_bs`) read from I…
Published: 2026-03-19 · CVSS: 6.5 · CVSS 3.1
A flaw was found in libarchive. An Undefined Behavior vulnerability exists in the zisofs decompression logic, caused by improper validation of a field (`pz_log2_bs`) read from ISO9660 Rock Ridge extensions. A remote attacker can exploit this by supplying a specially crafted ISO file. This can lead to incorrect memory allocation and potential application crashes, resulting in a denial-of-service (DoS) condition.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7